To become undone; to collapse.
To separate the threads (of); disentangle.
To become separated; (of something woven, knitted, etc.) to come apart.
To separate the connected or united parts of; to throw into disorder; to confuse.
To clear from complication or difficulty; to unfold; to solve.
to undo, untie, or open or become undone, untied, or opened.
Somehow she managed to unsnib the window and escape.